Book excerpt: Economy considerations have always played an important role in the generative theory of grammar. Indeed, the very development of the theory has been characterized by natural considerations of simplicity and economy. In the Minimalist Program, the operations of the computational system that produce linguistic expressions must satisfy general considerations of simplicity referred to as Economy Principles. In The Syntax of Nonfinite Complementation: An Economy Approach, the author completes two major research projects that solidify the foundation of the Minimalist Program: the elimination of c-selection and government. He then investigates in detail the nature of the Economy Principles in syntax. The discussion, which focuses on infinitival and participial complements, shows that a number of facts that previously have either not been accounted for or have received unsatisfactory treatment can be explained in a principled way once Economy Principles and, more generally, the Minimalist Program are adopted.